Installing Office Customization

Question

Name: From: file:///D:/Samples/TestUpdatedVersion/bin/Debug/TestUpdatedVersion.vsto

The customization cannot be installed because another version is currently insta

Answer 1

I had the same problem when deploying a new version of our VSTO word addin. After fiddling for 2 hours I found out that the Installation folder URL that you set in the properties of the solution (where it upgrades from) is case sensitive and stupidly needs to be the same case as the initial installation URL.